Leaders from some of the world's most powerful countries issued a joint statement over the weekend, blaming Donald Trump and the United States for the group's failure to reach an agreement on climate change.

In the declaration released by G7 countries following their yearly summit, the leaders of the other six nations involved in the discussion highlighted Trump's refusal to join them in the fight against climate change:

The United States of America is in the process of reviewing its policies on climate change and on the Paris Agreement and thus is not in a position to join the consensus on these topics. Understanding this process, the Heads of State and of Government of Canada, France, Germany, Italy, Japan, and the United Kingdom and the Presidents of the European Council and of the European Commission reaffirm their strong commitment to swiftly implement the Paris Agreement, as previously stated at the Ise-Shima Summit.

Trump, who was the lone holdout on adopting guidelines implemented by the 2015 Paris Agreement, took to Twitter to reaffirm the group's claim he had not yet decided on a policy:

During his campaign preceding the 2016 election, Trump summed up his stance on combating emissions by telling a South Carolina crowd, "I want to use hair spray." Trump has a long and vocal history of denying global warming, and has repeatedly claimed it is a hoax.

Angela Merkel, the current Chancellor of Germany, specifically mentioned how other G7 countries lobbied Trump to keep America in the Paris Agreement, which was implemented to cut back on carbon emissions.

“The entire discussion about climate was very difficult, if not to say very dissatisfying,” said Merkel. “There are no indications whether the United States will stay in the Paris Agreement or not.”

Belief in climate change has increasingly taken hold among American voters. 70 percent of those polled believe global warming is happening, and 55 percent of people believe that change is man-made. Complex spoke to Bill Nye in April, and he said his wish is for American legislators to respond to the scientific community's consensus on the matter.

"The easiest thing, at first, is to be in denial, whether you’re talking about climate change or having broken something you can’t see," said Nye. “'Did I just break that?' Yeah, you did. There’s a few seconds of 'No, no, it’s fine. Put it back together.' We want to get legislators to get their worldviews shifted to respect the facts."